William evans



(No Model.)

W., EVANS GIRGULATING WATER GRATEAND FEED WATER HEATER. No. 459,274.

Patented Sept. 8, 1891.

INVENTOR,

[VITA E5555.

was c0.. wuro-u-r UNTTED STATES PATENT OFFICE.

ILLIAM EVANS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JAMES REAGAN, OF SAME PLACE.

GIRCU LATI NG WATER-G RATE AN D FEED-WATER H EATER.

SPECIFICATION forming part of Letters Patent No. 459,274, dated September 8, 1891.

Application filed March 20,1889- Serial No. 304,077. (No model.)

To all whom it may concern: branch from the pipe leading from the outlet Be it known that I, VILLIAM EVANS, a citiend of thegrate to the inlet-pipe for the boiler. zen of the United States, residing at Phila- A represents the steam-boiler; B, the wadelphia, in the county of Philadelphia and ter-circulating grate, which may be of any 55 5 State of Pennsylvania, have invented certain suitable form or make, but which I prefer to new and useful Improvements in Circulatconstruct with shaking-bars and with hollow ing \Vater-Grates and Feed-Water Heaters, of sectional bearing bars or ends, a type of which which the following is a specification. is fully shown, described, and claimed in My invention has relation to water-circupending applications filed October 29,1888, 60

I lating grates for the fire-boxes of locomotive Serial No. 289,476, and December 26, 1888, Se-

or stationary steam-boilers having valves in rial No. 294:,710.

the pipe connections for the boiler and grate Cl represents the feed-water pipe, which in and in the blow-off pipe to admit of the feedpractice is provided with a valve or is conwater being fed through the grate into the nccted to the pump or injector. (Not shown 65 boiler, of an automatic circulation of water in the drawings.) Pipe C connects with a from the boiler through the grate and back pipe I), one end (Z of which leads to the bott0 the boiler when the feedwvater is shut oil, tom of the boiler and the other end (1 is proof entirely shutting off the grate from the vided with a valve (Z and constitutes the boiler, and of blowing oil either the grate or blowcff end and valve forthe boilerand grate, 70 the boiler to separately cleanse the same;and as hereinafter more particularly described.

it has for its object the provision of check- In pipe 13, between its union with pipe 0 and valves in the pipe connections between the the boiler, is located a valve (1, and between grate and boiler, whereby the accumulation the blow-off cock (Z and the feed-pipe C pipe of air or the formation of air-traps in said I) is provided with a branch pipe 1), leading 75 pipes and grate and the consequent accidental to the inlet end of grate l3, and has a valve I).

burning out of the water-bars by reason of In pipe D between valve (1* and the feedtheabsence of water therein, due to the form a pipe connection therewith is a check-valve (1*,

tion of such air-traps in the grate-bar or its which opens downwardly by the pressure from pipe connections, is avoided, and the feeding the boiler and is closed upwardly by the feed- 8: 0 of air into the boiler along with or in advance water pressure in pipe D. Said checlcvalve of the feedwateris obviated, and, further, the may be of any suitable form; but I prefer the feeding of water through the grate to the hinged or pivoted fiat form of the same, as inboiler and theautomatic circulation from and dicated more plainly in Fig. 2, in order to to the boiler through the grate is effected in avoid contracting the water area or bore in 85 3 5 a more eiiicient manner. its casing.

My invention accordingly consists of the E represents a pipe having valve 6 leading combinations, constructions, and arrangefrom the outlet end of the grate B to the top ments of parts, as hereinafter described in the of the boiler, into which it passes and is conspecification, and pointed outin the claims. ducted along the interior of the boiler, as ingo Reference is had to theaccompanying drawdicated by dotted lines .r in Fig. 1, until it ings, wherein reaches a line of location corresponding to Figure 1 represents a perspective View, the bridge-wall in the fire-box or that part of partly broken away, of a stationary boiler theboilcrwhichis thehottestpartof thesame, with circulating-grate of the form having in order that the feedwater dropping or fall- 5 shaking-bars and a system of pipe connecing therefrom will not affect the gage-cocks tions between the boiler, grate, and feed and of the boiler, and that such water when debloW-off pipes embodying my improvements. posited in the boiler will at once be in the Fig. 2 is a sectional view of the preferable hottest part of the same. Another advantage form of check-valve in the pipe leading from of extending such pipe E into the boiler, as 10::

the feed-water pipe to the bottom of the boiler, described, is that the water flowing or forced and Fig. Sis a like view of check-valve for a through pipe E is subject to and receives increments of heat from within the boiler before escaping from pipe E, and an economy in the fuel needed to maintain the steam-supply is thereby effected.

Pipe E, or preferably, as indicated in Fig. 1, a branch 6 therefrom, is extended above the water-line in the boiler and is provided at its top with a check-valve a form of which is more plainly shown in Fig. 3. This check-valve is closed by the pressure in pipes E E and drops by gravity. Normally when there is no water in the boiler or grate the check-valves d 6 drop by gravity or are opened, and normally valve (1 in pipe D and the valves 1) and e are always opened and the blow-off valve (1 is closed. \Vhen water is fed to the boiler through the grate B, the check-valve d closes to prevent air or water passing into the bottom of the boiler, such water by the closure of check-valve (it being conducted through the grate to pipe E and thence to the top of the boiler. As the feedwater finds its way through the pipe connections and grate-bars the air in the grate or its pipe connections escapes to the branch pipe 6 and through the check-valve e to the external air, and hence trapping of air in such fixtures is avoided and an easier circulation of water through the grate to the boiler is effected, and all accidental burning out of the water-pipes, due to absence of water therein by reason of air-traps, is obviated. WVhen the feed-water is shut off from pipe D, the check-Valve d drops by the pressure from the boiler and an automatic circulation from the bottom of the boiler to and through the grate and back to the boiler takes place. Should any accident occur to the grate, causing leakage, or should any other impairment of the same take place necessitating repairs, by closing valves 61 and e the grate is cut off from the boiler, and the feed-water being shut off and the blow-off valve (1 opened, the water in the grate is drained off to admit of repairing the grate. To blow off the grate at any time independently of the boiler, the valve 01 is closed and the valves 6, b, and (l are opened, whereupon the boiler-pressure is then through pipe E and acts to blow off the grate through pipe I), valve 1), and blow-off cock (Z To blow off the boiler, the valves 1) e are closed and the valves d and d are opened. The

check-valve d opens by the prcssu re from the boiler.

As it is obvious that the pipe connections for different forms of grates and boilers need to be variously located and the valves in said pipes correspondingly placed, I do not confine myself to the arrangement of pipes herein shown.

The feed-pipe-O from the pump or injector may be used alone or in conjunction with a separate or the usual feed-water pipe,in which case the latter serves for feeding the boiler when the grate is cut off from the boiler or when the feed through the grate is closed and the automatic circulation from the boiler to the grate and back again to the boiler occurs.

What I claim is 1. The ,combination, with a steam-boiler furnace, circulating-grate, pipe connections between the boiler and grate, a feed-pipe, and blow-off pipe, of valves in said pipes to admit of shutting off the grate from the boiler and of blowing off either the grate or boiler, and check-valves and air-escape, substantially as set forth.

2. The combination of a steam-boiler furnace, circulating-grate, pipe connections be tween the boiler and grate, a feed-pipe, valves in said pipes for controlling said feed, and check-valves in the pipes between the boiler and grate, substantially as set forth.

3. In combination with a steam-boiler furnace, water-bar grate, pipe connections and Valves for feeding the water through the grate to the boiler, and check-valves in the pipes between the boiler and grate, substantially as set forth.

at. The combination of a boiler A, waterbargrate B, pipe D, having feed-water pipe 0, valve 61 check-valve (l and branch 1), with valve 1), outlet-pipe E, having valve 2, check-valve c and its terminal end extending into the boiler, substantially as set forth. 5. The combination of a boiler A, waterbar grate B, a system of feed-water and valved pipe connections, including pipe E, for said boiler and grate, and said pipe E, having branch 6, with check-valve c and its terminal end extending for some distance into the boiler, substantially as set forth.

In testimony whereof I atiiX my signature in presence of two witnesses.

WILLIAM EVANS.

\Vitnesses:

J. R. MASSEY, FRANK R. JORDAN. 

